A former UK ambassador to Dublin fears a return to IRA violence across the UK if devolution is not restored. Former diplomat Sir Ivor Roberts (72) - who served from 1999 to 2003 as Ambassador to Ireland - also hit out at 'tone-deaf' comments from what he called the "Westminster Establishment" which were raising the political temperature in Northern Ireland. Writing in today's Belfast Telegraph, Sir Ivor said a recent republican car bomb in Londonderry and letter bombs sent to cities in the UK were warnings of a deteriorating situation. Sir Ivor is now a senior adviser to the Counter Extremism Project policy group.